TORX BIT: T15 Torx Bit 6" Length - Size T15 Heavy-duty, long TORX bits. Industrial-grade hardened and tempered tool-steel resists stripping and cam-out. 1/4" Quick-change shank works with adapters. A Torx bit can be good for helping you not to loose/drop a screw as it "grips" the screw head to some degree. Using a Torx bit (with torx head screws) allows you to apply more torque to the screw than you would be able to with other bits such as a phillips bit. With this extra long 6" torx bit you can easily reach into those hard to reach places to insert a torx head screw. A long torx bit will help you to reach up inside of cabinets, in areas where you can not get your cordless drill close enough, down inside of a hole, etc...